M=(3085-x)*(1-60%)*1+x*0.4=3085*0.4=1234 怎么算~
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M=(3085-x)*(1-60%)*1+x*0.4=3085*0.4=1234 怎么算~
![M=(3085-x)*(1-60%)*1+x*0.4=3085*0.4=1234 怎么算~](/uploads/image/z/20189090-2-0.jpg?t=M%3D%283085-x%29%2A%281-60%25%29%2A1%2Bx%2A0.4%3D3085%2A0.4%3D1234+%E6%80%8E%E4%B9%88%E7%AE%97%7E)
设男人x人,女人3085-x人,施舍了y元
(1-60%)x×1+(3085-x)×0.4=y
0.4x+3085×0.4-0.4x=y
y=3085×0.4
y=1234
(1-60%)x×1+(3085-x)×0.4=y
0.4x+3085×0.4-0.4x=y
y=3085×0.4
y=1234